One product issued by NWS for: San Juan PR
Heat Advisory
URGENT - WEATHER MESSAGE National Weather Service San Juan PR 144 AM AST Tue Aug 18 2026 PRZ001>005-007-008-010>013-VIZ001-002-182100- /O.NEW.TJSJ.HT.Y.0038.260818T1400Z-260818T2100Z/ San Juan and Vicinity-Northeast-Southeast-Eastern Interior-North Central-Ponce and Vicinity-Northwest-Mayaguez and Vicinity- Southwest-Culebra-Vieques-St.Thomas...St. John...and Adjacent Islands-St Croix- Including the cities of Cabo Rojo, Anna`s Retreat, Aguada, Grove Place, Toa Baja, Las Piedras, Carolina, Hormigueros, Barceloneta, Juana Diaz, Hatillo, Charlotte Amalie East, Loiza, Dorado, Santa Isabel, Frederiksted Southeast, Camuy, Vega Alta, Florida, Toa Alta, Christiansted, Mayaguez, Trujillo Alto, Canovanas, Humacao, Guayama, Caguas, Ponce, Cruz Bay, Rio Grande, Fajardo, Guaynabo, Manati, San Juan, Guayanilla, Comerio, Lajas, San German, Naguabo, Penuelas, Yabucoa, Cidra, Vega Baja, Catano, Ceiba, Gurabo, Salinas, Isabela, Rincon, Charlotte Amalie, San Lorenzo, Frederiksted, Patillas, Arroyo, Maunabo, Aguas Buenas, Juncos, Anasco, Moca, Culebra, Vieques, Charlotte Amalie West, Arecibo, Aguadilla, Quebradillas, Luquillo, Guanica, Cayey, Yauco, and Bayamon 144 AM AST Tue Aug 18 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 5 PM AST THIS AFTERNOON... * WHAT...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. expected. * WHERE...Portions of Puerto Rico and Virgin Islands. * WHEN...From 10 AM this morning to 5 PM AST this afternoon. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ GRS